Blood donation sample survey reveals that the new corona may have reached the United States as of December 2019

Following the discovery of the new coronavirus (SARS-CoV-2) in China at the end of December 2019, each country has taken measures such as closing borders and strengthening quarantine since the beginning of 2020, and is infected with the new coronavirus. Attempts have been made to prevent the invasion of the virus that causes the disease (COVID-19). However, as a result of investigating blood donation samples collected in the United States, `` As of December 2019, before SARS-CoV-2 was reported in China, SARS-CoV-2 had reached the United States. It may have been. '

Serologic testing of US blood donations to identify SARS-CoV-2-reactive antibodies: December 2019-January 2020 | Clinical Infectious Diseases | Oxford Academic

COVID-19 may have arrived in US by December 2019 | Live Science

SARS-CoV-2 was officially reported at the end of December 2019, but before that people could have been infected with SARS-CoV-2 and some had COVID-19. Sex is also suggested. It has been reported that SARS-CoV-2 was already widespread in China as of the fall of 2019, and there is also a research result that COVID-19 was widespread in France in December 2019.

In addition, when a chest X-ray photograph taken in November 2019 was investigated, a case matching COVID-19 was found, so `` SARS-CoV-2 has reached Europe in November 2019. There is also the possibility of 'ta'.

The possibility that 'the new coronavirus had reached Europe in November 2019' emerged --GIGAZINE

The first cases of COVID-19 were confirmed in the United States on January 20, 2020, but the US Centers for Disease Control and Prevention suspected that SARS-CoV-2 had reached the United States before that. A research team at the Centers for Disease Control and Prevention (CDC) analyzed blood donation samples collected by the American Red Cross from December 13, 2019 to January 17, 2020.

As a result of antibody testing on a total of 7389 blood donation samples, it was found that 106 of them had SARS-CoV-2 antibody. Of these, 39 samples were collected from December 13-16, 2019 in California, Oregon, and Washington, and 67 samples were collected from December 30, 2019 to January 17, 2020 in Connecticut. It was collected in Iowa, Massachusetts, Michigan, Rhode Island, and Wisconsin.

However, the SARS-CoV-2 antibody test does not necessarily indicate that the subject was infected with SARS-CoV-2, but the antibody against another previously infected coronavirus cross-reacted and SARS-CoV- It may also function as an antibody against 2. The research team then conducted additional tests to investigate the presence of SARS-CoV-2-specific antibodies, and reported that a total of 84 samples were found to have SARS-CoV-2-specific antibodies. I am.

A small number of false positives can occur with multiple tests, but the number of SARS-CoV-2 positive samples found in this study is higher than expected to occur with false positives alone. thing. 'It is very unlikely that all samples will show false positives,' the research team said in a treatise, and SARS-CoV-2 was brought to the United States from December 2019 to early January 2020. I conclude that it may have been.

The study does not know where the people who donated the blood were infected with SARS-CoV-2. In other words, it is unknown whether the infected person was infected with SARS-CoV-2 by traveling to China or was infected with SARS-CoV-2 in the United States.

The researchers argued that traces of SARS-CoV-2 genetic material should be investigated in people's fluids and blood samples collected as of 2019 to confirm the findings. Professor George Rutherford, who studies epidemiology and biostatistics at the University of California, also contacted donors who donated SARS-CoV-2 positive blood in future studies to determine the presence or absence of COVID-19 symptoms. He said that he could get information such as travel history to China and other countries.

in Science, Posted by log1h_ik